Happy Pi Day! Every year on March 14th (3.14), we celebrate the most well-known mathematical constant in the world: Pi. In case you need a refresher, Pi (the Greek letter: π) is the constant number always found when you divide the circumference of a circle with its diameter. Math aside, it’s also a homophone for pie, a delicious, conveniently circular dessert, which is why we’re celebrating it today! Make your own mini pies today with one of these spectacular sweet and savory hand pie recipes.